I demoed this plugin and was incredibly impressed by the results I got with it.
It provided reliable and great results on various sources: drums, vocals, pianos and mic'ed cabinets. It even helped with layering a DI and amplified bass.
It's dead-simple to use and a real time saver. I have had about 21 instances of it in a project and noticed no performance issues at all. This is quite on-brand for Melda, all their plugins I have used are efficient.
I was kind of surprised to see the other review, truth be told. I don't doubt that person's experiences or expertise with audio engineering at all - they clearly know what they're talking about. Let us factor in that this review is a couple of years old, and Melda update their plugins zealously. I suspect that many of the issues that did exist no longer do.
In light of the other review (which is perfectly valid), the best thing to do is to demo the plugin and see for yourself whether it works for you. But this has been one of those rare plugins that offers a ton to my workflow instantly. The price is hard to beat too. Melda's licensing policies and support are in my experience also excellent.